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EC-212 < DTC/CIRCUIT DIAGNOSIS > [QR25DE] P0112, P0113 IAT SENSOR 2. CHECK INTAKE AIR TEMPERATURE SENSOR POWER SUPPLY CIRCUIT 1. Turn ignition switch OFF. 2. Disconnect ECM harness connector. 3. Check the continuity between mass air flow sensor harness connector and ECM harness connector. 4. Also check harness for short to ground. YES >> Perform the trouble diagnosis for power supply circuit. NO >> Repair or replace error-detected parts. 3. CHECK INTAKE AIR TEMPERATURE SENSOR GROUND CIRCUIT 1. Turn ignition switch OFF. 2. Disconnect ECM harness connector. 3. Check the continuity between mass air flow sensor harness connector and ECM harness connector. 4. Also check harness for short to power. YES >> GO TO 4. NO >> Repair or replace error-detected parts. 4. CHECK INTAKE AIR TEMPERATURE SENSOR Check the intake air temperature sensor. Refer to EC-210, "Component Inspection" Is the inspection result normal? YES >> GO TO 5. NO >> Replace mass air flow sensor (with intake air temperature sensor). Refer to 5. CHECK INTERMITTENT INCIDENT GI-44, "Intermittent Incident" >> INSPECTION END Component Inspection INFOID:0000000011277960 1. CHECK INTAKE AIR TEMPERATURE SENSOR 1. Turn ignition switch OFF. 2. Disconnect mass air flow sensor harness connector and reconnect it again. 3. Turn ignition switch ON. 4. Select “DATA MONITOR” mode with CONSULT. 5. Check that “INT/A TEMP SEN” indicates as per following condition. Is the inspection result normal? + − Continuity MAF sensor ECM Connector Terminal Connector Terminal F22 4 F51 33 Existed + − Continuity MAF sensor ECM Connector Terminal Connector Terminal F22 2 F51 34 Existed Monitor item Condition Value (Approx.) INT/A TEMP SEN Temperature [ °C (°F)] 25 (77) 1.9 - 2.1 (V) |